9 printings of Hero's Downfall
They range from $0.14 to $2.89 — a 21× difference for a card with the same name. The set code and collector number printed along the bottom edge are what tell them apart.
| Secret Lair Drop | SLD 312 | $2.89 |
| Innistrad: Double Feature | DBL 387 | $0.54 |
| Foundations | FDN 319 | $0.36 |
| Theros | THS 90 | $0.27 |
| Foundations | FDN 175 | $0.25 |
| Dominaria United Commander | DMC 112 | $0.19 |
| Innistrad: Crimson Vow | VOW 120 | $0.14 |
| The List | PLST VOW-120 | $0.14 |
Not sure which one you are holding? OtterDex reads the set code and collector number off the card and tells you.